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0.82 x amps. x volts
Liter/s= -------------------------
Diff. temperature ˚C
3.1 x amps. x volts
CFM = ------------------------
Diff. temperature ˚F
3.4.1.
Supply Air Temperature Rise Test
1.
Operate the unit at maximum power for at least 10
minutes;
2.
Measure the air temperature in the return air plenum;
3.
Measuring the air temperature in the largest trunk
coming off the supply air plenum, just outside the range
of radiant heat from the heat exchanger. 0.3 m (12")
from the plenum of the main take-off is usually sufficient;
4.
The temperature rise is calculated by subtracting the
return air temperature from the supply air temperature.
If the temperature rise exceeds the temperature specified
(±5˚F) in Table 2, move the "AC/HP CFM ADJUST" black
wire to high (HI) position. If the excessive temperature rise
cannot be reduced by increasing fan speed, investigate for
ductwork obstructions or dirty and improper air filter.
CAUTION
It is important to check the airflow and to ascertain that
the unit does not operate above the temperatures
specified in the Technical Specifications (Table 2). This
is particularly important if a cooling coil or a heat pump
has been installed in the ducts.
Hi-Limit thermal protectors should never need to engage
during the normal functioning of the appliance. They
are strictly designed to engage during the improper
functioning of the blower or when the filter was
improperly maintained.
3.4.2.
High limit verification
After operating the furnace for at least 15 minutes, restrict
the return air supply by blocking the filters or the return air
register and allow the furnace to shut off on High Limit. The
electric heaters must deactivate themselves one by one
before the warm air temperature exceeds 200˚F.
Remove the obstruction and the elements should restart
after a few minutes.
4.0
MAINTENANCE
Preventive
maintenance
unnecessary expense and inconvenience.
heating system inspected by a qualified service technician at
regular intervals. Do not attempt to repair the furnace or its
controls. Call a qualified service technician.
Electrical shock hazard.
Turn OFF power to the furnace before any disassembly
or servicing.
Failure to do so can result in death, bodily injury and/or
property damage.
Before calling for repair service, check the following points:
1.
Check fuses or the circuit breaker;
2.
Check if the 15 A circuit breaker on the furnace is
disengaged;
3.
Check the 5A fuse on the control board;
4.
Set the thermostat higher than room temperature. If the
unit does not start up, cut the power and call la qualified
service technician.
When calling for service or ordering a replacement part,
specify the model and serial number of your appliance.
4.1
AIR FILTER
The filter supplied with the unit is the disposable type and
should be replaced twice a year. The presence of animal
hair, dust, etc. may necessitate more frequent changes.
Dirty filters have an adverse effect on the performance of the
central heating system.
4.2
MOTOR LUBRICATION
Do not lubricate the blower motor, since it is permanently
lubricated.
10
is
the
best
way
Have your
WARNING
to
avoid
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